Erwin lavens



(No Model.)

E. LAVENS. GAR- BON HoLDER PoR ARG LAMPS.

No. 519,334. y Patented May 8, 1894.

Ufff j a@ INVENTOR @wi/W @wm BY Z22/l mm a ATTORNEY PATENT ERWIN LAVENS, OF BROOKLYN, ASSIGNOR TO SIGMUND BERGMAN, OF

NEW YORK, N. Y.

CARBON-HOLDER FOR ARC LAMPS.

`SPECIFIGA'IION forming part of Letters Patent No, 519,334, dated May 8, 1894. Application filed September 30, 1893. Serial No. 486,925- (No model.)

To all whom it may concern:

Be it known that I, ERWIN LAVENs, ot' Brooklyn, county of Kings, and State of New York, have invented a new and useful Improvement in Carbon-Holders for Electric Lamps, 1

of which the following is a specification.

I will describe a carbon holder embodying my improvement and then point out the novel features in the claims.

In the accompanying drawings Figure lis a side View of a carbon holder embodying my improvement, and this View also includes a side view of a part of a lamp on which it is used. Fig. 2 is a plan or top view of this carbon holder and said part of a lamp. Fig. 3

is a vertical section taken at the plane of the line 5, in Fig. 2. Fig. 4 is a plan or top view of the base piece or supporting piece of the bodying the improvement in still another modified form. Fig. 1l is a plan or top view of the latter modification.

Similar letters of reference designate corresponding parts in all the figures.

In Figs. 1, 2, 3, 4, and 5, A designates a part or appurtenance of the frame of an electric arc lampv of any suitable construction.

B designates the base piece or supporting piece for a carbon holder used with such lamp. Its shape and construction may be best understood by reference to Figs. 4 and 5, where it will be seen, that' it comprises a main plate-like portion b, capable of being fastened by screws, or other means, to a part A of the electric lamp, and having a more elevated plate like portion b. The portion intermediate of the two plate-like portions being made in the form of acylindric hub b2. It will be seen that the plate like portion b is not straight, but is partly oblique. The obL` ject of this feature of construction is to enable the carbon holder to be arranged obliquely to the part A, so as to have more space than it could have if it were arranged entirely over said part. y

C', C2 designate two arms, which are pivotally connected together by studs C, which, preferably, will consist of a screw passing through holes c', c2, formed in said arms and engaging with a tapped hole in the hub-like portion b2 of the base piece or supporting piece B. Not only can the arms swing relatively to each other, but both may swingl to one side `about the screw C. This bodily swinging motion of the two arms relatively to the base piece or supporting piece is ad- Vantageous because it enables the carbon, which is supported by the arms, to be brought into alignment with its fellow carbon.` A screw D passing through a hole c3, formed in the arm C2 rearward of the screw C and passing through an arc-shaped slot, formed concentrical to the pin and to the screw C, within the plate-like portion b of the base piece or supporting piece, and receiving a nut d below the latter, serves to clamp the two arms in position against bodily adjustment together after their proper position has been attained, but without interfering with the adjustment of the arm C' relatively to the arm C2, for the purpose of gripping or releasing a carbon.

Pivotally connected to the arms C', G2, so as to project from one side thereof, are nuts E', E2. These are here shown as made in the form of cylinders, having tapped holes formed in them, transversely to their axes. These nuts may be connected with the arms in any suitable manner. I have shown them as being shouldered, so as to form cylindric tenons or bosses which pass through holes c4, c5 formed in the arms and screw-threaded beyond the arms to receive nuts e', e2, for retaining them in place.

F designates a screw having reverse screw threads near its ends for engaging with the nuts@ I have shown these screw threads as formed of portions of different diameters. At one end the screw isprovided with a head f by which it maybe conveniently turned. Obviously, by turning the screw in one direction the arms will be spread apart, and by turning it in the reverse direction, the arms ICO may be drawn together. The free or outer ends of the arms will be constructed in any suitable manner to form jaws c6, c7. As here shown, the material of which the arms are made is Iiattened out and bent in an angle to form the jaws.

All the parts may be made of any suitable metal.

Turning now to Figs. 6 and 7, itwill be seen that I use a similarconstruction,but that the base piece or supporting piece B is provided with jaws b5, h6 to enable it to grasp any part of the lamp arranged above it, a screw being employed to fasten it in place. In this example of my improvement, I dispense with the nuts e,e2,and the screwf, and in lieu thereof, I employ a screw G, which engages with a tapped hole 57 in the base piece or supporting piece B, and is provided with a conical portion g, which, by turning the screw will be moved longitudinally between two extensions 010, all ot' the jaws C', C2, these extensions being rearward of the pivot O. By this combination of parts, the jaws of the arms may be made to release or grip a carbon.

In Figs. 8 and 9, I' have shown that the arms C', C2 may be pivoted at the extreme ends, by means of the screw O and cross forward ot' the pivot in such a way as to leave a space intermediate of their cross portions, and said pivot screw. A screw D, like that already described, has a conical portion passing between the arms C', C2 intermediate of where they cross eachother and of their pivoted screw C, producing the same results as in the last previously described example of my improvement.

In Figs. 10 and 1l, I have substituted for the arms C', C2, two sliding blocks c', c2, which are fitted to a base piece or supporting piece B that may be fastened in any desired inanner to the part A of any other portion of a lamp, and in any suitable manner. The opposite faces of the blocks are concave to grasp a carbon.

F designatesv a screw, like the screw F, in that form of my improvement, which is illustrated in Figs. l, 2, 3, 4. and 5; it has two reverselythreaded portions, being engaged with tapped holes in the blocks c', c2. This screw is supported in an upright projection blo, formed within the base piece or supporting piece B. Only the portion of smaller diameter passes through the projection blo; the screw being held against longitudinal movement in one direction, by the shoulder formed on the end of the portion of larger diameter and against movement in the opposite direction by means of a finger bm which is fastened to the portion of smaller diameter.

Vhat I claim as my invention, and desire rto secure by Letters Patent, is

1. In a carbon holder for an electric lamp the combination of a base piece or supporting piece, two arms, one pivotally connected to the other, and both being connected to the base piece or supporting piece, and means for oscillating the movable arm, substantially as specified.

2. In a carbon holder for an electric lamp the combination of a base piece or supporting piece, two arms, one pivotally connected to the other, and both being connected to the base piece or supporting piece, means for oscillating the movable arm, and a screw for adjusting the movable arm relatively to the other, substantially as specified.

3. The combination in a carbon holder for an electric lamp, of a base piece or supporting piece, two arms pivotally connected together, meansfor adjustably securing one of said arms to the base piece or supporting piece, and means for moving one of the arms relatively to the other, substantially as specitied.

4t. In a carbon holder for an electric lamp the combination of a base piece or supporting piece, two arms pivotally connected to each other and a cam or wedge movable between the said arms, so as to move one of them relatively to the other, substantially as specified.

In testimony whereof I have signed my name to this specilication in the presence of two subscribing witnesses.

ERWIN LAVEN S.

Witnesses:

ANTHONY GREF, S. A. PALMER. 

